I installed this update to and got the attached message when I tried to open Dreamweaver.
The current situation of some extensions not being required because you have different extensions installed is very confusing.
When these emails are sent out about extension updates a notice should also be included that states something to the effect of "Users who have CSS Form Builder installed will not require this update".
It's very annoying as now I have to waste time uninstalling both of these extensions and reloading CSS Form Builder.